In calculation, adopted load-unload criterion of stress wave propagation was to decide load-unload state of element and to adjusts and transfers internal stress for tensile failure element as well.
计算中用应力波传播的加卸载判别准则来决定单元的加卸载状态，对受拉破坏单元进行内部应力调整和应力转移。
Suggestions are made to use the criterion to determine the load capacity of engineering piles by loading test.
并提出了利用该标准对工程桩作压载试验确定其承载力的有关建议。
Research show that the method of extrapolating failure load and net section yield criterion are available.
研究表明，推算破坏载荷和净截面屈服判据是合理的，可用的。
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